My students are always needing help with the process of writing numerical expressions to match the word expressions. I made a set of 24 cards that can be used for a whole class matching activity, where each person gets their own card and has to find their partner. They can also be used for a set of cards for matching in small groups or centers. They can be solved, or not, depending on the needs of your students. They are also great for having your students use them to generate a list of key words for addition, subtraction, multiplication and division.
The PDF form is attached here!